Influence of drip irrigation and liquid fertigation system with year-round plastic mulching on nitrogen leaching in a citrus orchard
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- WATANABE Shuichi
- Western Region Agricultural Research Center, NARO
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- KASAHARA Yoshiaki
- Western Region Agricultural Research Center, NARO
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- MATSUMORI Kenji
- Western Region Agricultural Research Center, NARO
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- SHIMIZU Yuta
- Western Region Agricultural Research Center, NARO
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- MUKAI Akie
- Institute for Rural Engineering, NARO
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- ONODERA Shin-ichi
- Graduate School of Integrated Arts and Sciences, Hiroshima University
Bibliographic Information
- Other Title
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- 周年マルチ点滴灌水同時施肥法の導入がカンキツ園での窒素溶脱に及ぼす影響
- シュウネン マルチ テンテキ カンスイ ドウジ セヒホウ ノ ドウニュウ ガ カンキツエン デ ノ チッソ ヨウ ダツ ニ オヨボス エイキョウ
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Abstract
<p>The “drip irrigation and liquid fertigation system with year-round plastic mulching (MD system)” is a cultivation method whereby plants are irrigated using a drip tube underneath a plastic mulch sheet. This study investigated how an MD system affected nitrogen (N) leaching by measuring the changes in soil inorganic N levels in a satsuma mandarin orchard.</p><p>In the control plot, N, in the form of solid fertilizer, was applied to the surface of the soil according to local fertilization practice. In the MD plot, N, in the form of liquid fertilizer, was applied using the MD system. The amount of N in the MD plot was 60% of the control plot. The total amount of inorganic N in the soil, which was collected at 30–60 cm apart from the tree trunk, was measured in consideration of the distance from the drip tube. As a result, the total amount of inorganic N after cultivation in the MD plot was lower than that in the control plot. The amount of leached N was estimated from the levels of soil inorganic N before and after cultivation, amount of fertilizer N added, and plant absorbed N in the fruit. The estimated amount of leached N from the MD plot was less than that from the control plot. The N applied through irrigation water, which contained nitrate, was similar to the estimated amount of N that leached from the MD plot. Therefore, the results suggest no net N leaching from the MD plot.</p><p>In conclusion, the MD system effectively reduced N leaching in the citrus orchard.</p>
Journal
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- Journal of Japanese Association of Hydrological Sciences
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Journal of Japanese Association of Hydrological Sciences 46 (3), 249-262, 2016
THE JAPANESE ASSOCIATION OF HYDOROLOGICAL SCIENCES
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Keywords
Details 詳細情報について
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- CRID
- 1390001204423638656
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- NII Article ID
- 130006825366
- 40021045536
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- NII Book ID
- AA11123427
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- ISSN
- 18837166
- 13429612
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- NDL BIB ID
- 027816992
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed